I think he wished to atone for the mistakes he made. But... I don't know. He is with the ancestors now. I hope he has found peace.

[It is kind of a problem.

At Hiro's question, something troubled crosses Thrall's expression.]

You don't know... Hiro, listen to me very carefully. [He stops, and he makes sure no one is around. It's just Snowsong, and his keen orcish hearing confirms they're alone. He sets his hands on Hiro's shoulders and looks into his eyes.]

If you lose your shard, you lose your connection to your world. You know that. But it also means that your world dies.